Method for controlling overflow pollution of urban rainwater system in high-density built-up area

Abstract

The invention discloses a method for controlling overflow pollution of an urban rainwater system in a high-density built-up area. The method for controlling the overflow pollution of the urban rainwater system in the high-density built-up area follows the overall thought of source sewage interception, non-point source control, desilting and dredging and tail end irrigation prevention and comprises four steps of source sewage interception, non-point source control, desilting and dredging and tail end irrigation prevention. Sewage is prevented from entering the rainwater system from a source by tracing and rectifying sewage pipes which are connected into the urban rainwater system in a misconnection and mixing manner; a sponge LID facility is arranged in an urban block, a flow abandoning well and a regulation and storage pond are arranged in a severe area with non-point source pollution, and non-point source pollution control in the middle link of a surface runoff and a rainwater entering system is achieved; and source control and sewage interception of the urban rainwater system are realized, and invasion of pollutants is greatly reduced.

Description

Technical field [0001] The present invention relates to the technical field of water environment remediation, and in particular to a control method of high-density built-in urban rainwater system overflow pollution. Background technique [0002] At present, the most common practice for the overflow pollution of the urban rainwater system is to set up artificial wetland + ecological buffer belt, abandoned well + adjustment pool, swirl separation equipment, etc. in the end of the urban rainwater system. Due to the characteristics of the rainwater system and the largest scale of the city, the desired manual wetland and the storage pool are great. Although the size of the storage pool is above tens of thousands of square meters, more than ten thousand square equal order, but due to the large scale of the water area, the long-selling path is long, and the end adjustment pool is not better to control the initial runoff contamination. For high-density built-in districts, the land use it...

AI Technical Summary

Problems solved by technology

Although the scale of storage tanks is on the order of tens of thousands to hundreds of thousands of cubic meters, due to the large scale of the catchment area and the long confluence path, the terminal storage tanks cannot control the initial runoff pollution well.

For cities in high-density built-up areas, when land use itself is difficult, such measures cannot be used to reduce and control overflow pollution

There are still doubts about the cleaning and separation effect and operation and maintenance of new devices such as cyclone separation equipment, and they are rarely used. They are still not enough to play a role in the reduction and control of overflow pollution in cities with high-density built-up areas.

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